Main content
Galileo's observations
Using Galileo's book Siderius Nucius, Prof Jim Al-Khalili reveals how the first observations of the night sky using a telescope changed our view of the cosmos.
Duration:
This clip is from
More clips from Light
-
![]()
Speed of light
Duration: 03:05
-
![]()
Perspective illusion
Duration: 00:56
More clips from Light and Dark
-
![]()
The first discovery—Dark
Duration: 02:04
-
![]()
Dark energy—Dark
Duration: 04:07
-
![]()
Galactic rotation—Dark
Duration: 01:55
-
![]()
The dark ages of the Universe—Dark
Duration: 01:33
